JP5084484B2 - Electronic percussion instrument - Google Patents

Description

  The present invention relates to an electronic percussion instrument, and more particularly to an electronic percussion instrument capable of controlling a musical sound intended by a performer.

  Conventionally, an electronic percussion instrument imitating an acoustic hi-hat cymbal has been provided. In such an electronic percussion instrument, the tone of the hi-hat depends on the amount of foot pedal depression, that is, the displacement of the upper cymbal based on the foot pedal depression. It is configured to be controlled. Japanese Patent Laying-Open No. 2005-195981 (Patent Document 1) discloses an electronic hi-hat cymbal that can simulate a feeling of performance similar to that of an acoustic hi-hat cymbal by moving an upper cymbal up and down according to the amount of foot pedal depression. .

  FIG. 6 shows an electronic hi-hat 80 disclosed in Patent Document 1, and FIG. 6A is an overall side cross-sectional view showing an upper cymbal 100, a lower cymbal 200, and an upper cymbal 100 and a lower cymbal. The cross section of the portion sandwiched between 200 is omitted and shown, and the cross section of these portions is shown in FIG.

  As shown in FIG. 6A, the electronic hi-hat 80 includes an upper cymbal 100, a lower cymbal 200, an extension rod 420 to which the upper cymbal 100 is movably connected, and a lower cymbal 200 that can be swung. A hollow shaft portion 410 that is connected, a spring 430 that is fitted in the lower end of the hollow shaft portion 410, a step-down foot pedal 440, a joint 450 that connects the extension rod 420 and the foot pedal 440, A leg portion 460 for supporting the standing of the entire electronic hi-hat 80 connected to the hollow shaft portion 410 is provided.

  The extension rod 420 is connected to the foot pedal 440 via the joint 450 below the extension rod 420, and the extension rod 420 is configured to move up and down in response to a stepping operation of the foot pedal 440. On the other hand, the upper cymbal 100 is swingably connected to the upper portion of the extension rod 420 by a connector. When the extension rod 420 moves up and down in response to the stepping operation of the foot pedal 440, the upper cymbal 100 is moved upward. The cymbal 100 moves up and down.

  The lower portion of the extension rod 420 penetrates the upper hollow shaft 411 and the lower hollow shaft 412, and the spring 430 fitted in the lower hollow shaft 412 also passes therethrough. The spring 430 is sandwiched between the lower side of the node part 420a provided on the extension rod 420 and the upper side of the node part 412 of the lower hollow shaft 412, so that the extension rod 420 is always moved upward. Since the urging force is received, the upper cymbal 100 and the lower cymbal 200 when the foot pedal 440 is not depressed are separated from each other by a predetermined interval.

  Next, the upper cymbal 100 and the lower cymbal 200 will be described with reference to FIG. FIG. 6B shows an open position where the upper cymbal 100 and the lower cymbal 200 are separated from each other. When the foot pedal 440 of the electronic hi-hat 80 is depressed, the upper cymbal 100 and the lower cymbal 200 are in close contact with each other. The closed position, which is the state to perform.

  The upper cymbal 100 has a striking surface 110 whose upper surface is formed of rubber, and a vibration sensor 70 for detecting vibration is provided on the vibration sensor mounting frame 120 on the back side of the striking surface 110 of the upper cymbal 100. . The vibration sensor 70 is a sensor that detects the vibration level of the vibration of the upper cymbal 100 due to the impact of the upper cymbal 100 or the contact between the upper cymbal 100 and the lower cymbal, and is, for example, a piezoelectric sensor. When the vibration sensor 70 detects a vibration level, an analog electrical signal corresponding to the vibration level is transmitted to the stereo jack 150 for link output via a wiring (not shown). The analog electric signal is further input from the stereo jack 150 to the link input stereo jack 250 of the lower cymbal 200 via the plug 130, the cable 131, and the stereo jack 230, and from an output terminal (not shown). Is output.

  As shown in FIG. 6B, the displacement sensor 60 is disposed between the upper cymbal 100 and the lower cymbal 200, and the displacement sensor 60 is housed in the bottom inside the hollow cylinder whose upper surface is opened. A circular sensor sheet, a conical coil spring disposed on the sensor sheet and extending from the top to the bottom, and a lid portion contacting the top of the coil spring It is composed of When the foot pedal 440 is depressed, the space between the upper cymbal 100 and the lower cymbal 200 gradually shifts in the direction of closing according to the amount of depression.

  At that time, when the foot pedal 440 is lowered, the lid portion is pushed down, whereby the coil spring is pressed against the cushion seat and compressed, and is deformed in the vertical direction by the compression force. The deformation caused by the compression of the coil spring in the vertical direction is electrically detected using the sensor seat portion, whereby the depression amount of the foot pedal 440, that is, the displacement amount of the upper cymbal 100 (hereinafter referred to as “upper cymbal position”). "). When the coil spring is compressed and deformed by depressing the foot pedal 440, the conical coil spring presses the resistance printing sheet material of the sensor sheet portion, so that a part of the resistance printing sheet material is a carbon printed board. Pressed against. As a result, the conductive ink on the resistance printing sheet material comes into contact with the electrode pattern of the carbon printing substrate, and the electric resistance value of the carbon printing substrate changes. This electric resistance value changes in accordance with the magnitude of the compression deformation of the coil spring, that is, the upper cymbal position due to the foot pedal 440 being depressed. This electrical resistance value is detected via an output terminal (not shown).

  As described above, in the electronic hi-hat cymbal in which the upper cymbal 100 is movable, when the position of the upper cymbal 100 (upper cymbal position) is detected by the displacement sensor 60, the upper cymbal 100 is hit or the foot pedal is depressed. In the case of vibration due to contact with the lower cymbal 200, a tone corresponding to the upper cymbal position detected by the displacement sensor 60 is generated. At that time, when the vibration sensor 70 detects the vibration level of the upper cymbal 100 and the vibration level exceeds a predetermined threshold value, a trigger signal for instructing the sound source to generate a musical sound is output.

  FIG. 7 is a diagram conceptually showing the relationship between the upper cymbal position detected by the displacement sensor 60 and the tone color of the musical tone produced by the sound source, with the horizontal axis representing the displacement sensor value and the vertical axis representing the musical tone to be produced. Shown as a level. The displacement sensor value indicating the horizontal axis indicates a position at which the upper end cymbal 100 and the lower cymbal are in close contact with each other at the left end, and indicates a value at which the distance between the upper cymbal 100 and the lower cymbal 200 increases toward the right. A range in which the displacement sensor value is smaller than a predetermined threshold is referred to as a closed position, and a range in which the displacement sensor value is greater than a predetermined threshold is referred to as an open position.

  Five types of hi-hat sounds (open sound, half sound, slite sound, close sound, press sound) are associated with the output range of the displacement sensor value, and the open sound, half sound, and slite corresponding to the open position. The sound is an open tone, and the close tone corresponding to the close position and the press tone are classified as a close tone.

  Open musical sounds (open sound, half sound, and slite sound) are crossfaded according to the displacement sensor value, and closed musical sounds (closed sound and press sound) are also crossed according to the displacement sensor value. Faded.

  Further, the open tone and the close tone are switched exclusively with each other at a predetermined threshold value of the displacement sensor value, as in the case of the acoustic hi-hat cymbal.

When the upper cymbal position is in the open position and an open tone is sounding, the pedal is depressed, and when the displacement sensor value falls below a predetermined threshold, the close tone is pronounced and is currently being played. The sound source is controlled so as to rapidly attenuate (truncate) the open musical tone and generate the closed musical tone.
JP 2005-195981 A

  However, in the electronic hi-hat cymbal as described above, if the upper cymbal is strongly hit with a stick or the like without stepping on the foot pedal, the upper cymbal is lowered and the player does not intend when the position of the upper cymbal reaches the threshold value. However, there is a problem that the cymbal sound may be muted.

  FIG. 8 is a timing chart showing the problem. FIG. 8A is a diagram in which the horizontal axis represents time and the vertical axis represents the displacement sensor value. When the displacement sensor value changes in this way, the state of the musical sound generated by the sound source is illustrated in FIG. (C).

  FIG. 8 (b) shows the level of an open tone generated by the time on the horizontal axis and the sound level generated by the sound source on the vertical axis, and FIG. 8 (c) shows the time generated by the sound source on the horizontal axis. It is a figure which shows the level of a closed type musical sound.

  When the displacement sensor value is at an open position in the vicinity of a threshold value (indicated by a one-dot chain line), the case where the upper cymbal 100 is hit at timing a is shown. As shown in FIG. Starts to fall, and at a timing b, falls below a predetermined threshold value and becomes a closed position. After descending once, it rises again, exceeds the threshold at timing c, and becomes the open position again.

  Since the upper cymbal 100 is hit at the timing a, the sound generation of the open-type musical tone is started as shown in FIG. Next, since the upper cymbal 100 changes from the open position to the closed position at timing b, the open-type musical sound that is sounding is rapidly attenuated. At the same time, a closed waveform is generated as shown in FIG. After that, when the displacement sensor value returns to the original value at timing c, the open-type musical tone is generated again, and the closed-type musical tone is attenuated. Therefore, between the timings bc, the open-type musical sound that is not intended by the performer is rapidly attenuated, and the closed-type musical sound is generated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic percussion instrument that can control a musical tone intended by a performer.

  In order to solve the above-described problem, an electronic percussion instrument according to claim 1 is a position detection unit that detects a position of a hitting surface whose position is arbitrarily operated, and a hit detection unit that detects whether the hitting surface is hit. A musical sound generation instruction means for instructing a sound source to generate a musical sound according to the position of the hitting surface detected by the position detection means when the hitting detection means detects that the hitting face has been hit; and the position detection means When the detected position is the first position, a tone stop instruction means for instructing the sound source to stop the tone generated according to the instruction by the tone generation instruction means, and the hitting surface is set by the hit detection means. The first time measuring means for measuring the time from when it is detected that the sound is hit, and the musical sound stop instructing means by the musical sound stop instructing means until the time measured by the first time measuring means passes a predetermined time. Stop And a controller for avoiding shown.

  The electronic percussion instrument according to claim 2 is the electronic percussion instrument according to claim 1, wherein the control means detects the time measured by the first time measuring means by the position detecting means after the predetermined time has elapsed. When the set position is the first position, control is performed so that a tone stop instruction is issued by the tone stop instruction means.

  The electronic percussion instrument according to claim 3 is the electronic percussion instrument according to claim 1 or 2, wherein the tone generation instruction means detects that the position of the percussion surface is the second position by the position detection means. The sound source is instructed to generate a musical tone of a predetermined tone color, and the first timing means detects the hitting surface detected by the position detection means when the hitting detection means detects that the hitting face has been hit. When the position is the second position, the time is measured.

  The electronic percussion instrument according to claim 4 is the electronic percussion instrument according to any one of claims 1 to 3, further comprising vibration level detection means for detecting a vibration level of the hitting surface, wherein the hit detection means is the vibration level. When the vibration level detected by the detection means is greater than the first threshold, it is detected that the striking surface has been hit, and the first time measuring means has the vibration level detected by the vibration level detection means as the first level. The time is measured when the value is larger than the second threshold value, which is larger than the second threshold value.

  The electronic percussion instrument according to claim 5 is the electronic percussion instrument according to any one of claims 1 to 4, wherein the position detection is performed before the predetermined time has elapsed by the time measured by the first time measuring means. When it is detected by the means that the position of the striking surface is the first position, it comprises a second time measuring means for starting time measurement, and when the time measured by the second time measuring means has passed a predetermined time, When the position of the hitting surface detected by the position detecting means is not the first position, the control means suppresses the stop instruction of the musical sound by the musical sound stop instructing means, and the hitting detected by the position detecting means. When the position of the surface is the first position, control is performed so that a musical sound stop instruction is issued by the musical sound stop instruction means.

  The electronic percussion instrument according to claim 6 is the electronic percussion instrument according to any one of claims 1 to 4, further comprising filter means for changing a change in position detected by the position detection means into a slow change, and the control means. Until the time measured by the first time measuring means passes the predetermined time when the position changed by the filter means is the first position. The sound source generated in response to the sound is instructed to the sound source, and after the predetermined time has elapsed, the position detected by the position detecting means is the first time. In the case of the position, control is performed so that a musical sound stop instruction is issued by the musical sound stop instruction means.

  According to the electronic percussion instrument of the first aspect, the position of the hitting surface whose position is arbitrarily manipulated is detected by the position detecting means, and whether the hitting face is hit is detected by the hitting detecting means. When the hit detection means detects that the hitting surface has been hit, the tone generation instruction means instructs the sound source to generate a tone corresponding to the position of the hitting face detected by the position detection means. For example, when an upper cymbal is hit in an electronic hi-hat, an open sound is generated when the upper cymbal is positioned above, and a close sound is generated when the upper cymbal is positioned below.

  The musical sound stop instruction means instructs the sound source to stop the musical sound generated by the musical sound generation instruction means when the position detected by the position detection means is the first position. In the electronic hi-hat, when an open sound is generated, the open sound is stopped when the upper cymbal is operated downward.

  The first time measuring means measures the time from when it is detected that the hitting surface is hit by the hit detecting means, and the control means until the time measured by the first time measuring means passes a predetermined time. The musical tone stop instruction by the musical tone stop instruction means is suppressed. Therefore, even if the upper cymbal is hit and the position of the upper cymbal is moved downward, the musical sound generated by the hit is controlled not to be stopped for a predetermined time. Conventionally, when the upper cymbal is struck, the upper cymbal may be moved downward for a relatively short time, and the musical sound is stopped unintentionally by the performer. The stop of the musical sound not intended by the performer is suppressed, and the musical sound intended by the performer can be controlled.

  According to the electronic percussion instrument of the second aspect, in addition to the effect of the electronic percussion instrument according to the first aspect, the control means detects the position after a predetermined time has elapsed. If the position detected by the means is the first position, it is instructed to stop the musical sound generated by the musical sound generation instructing means, so the player intentionally performed an operation such as lowering the upper cymbal. If you can stop the musical sound that is occurring. Therefore, there is an effect that the musical tone intended by the performer can be controlled.

  According to the electronic percussion instrument of the third aspect, in addition to the effect produced by the electronic percussion instrument of the first or second aspect, the musical sound generation instruction means is predetermined when the position detected by the position detection means is the second position. Since the sound source is instructed to generate the musical tone of the timbre, the first time measuring means performs time measurement when the position detected by the position detecting means is the second position. When the sound is struck in the upper position, an open sound is generated. In this case, a time is measured, and the stop of the open sound is suppressed until a predetermined time elapses. Therefore, there is an effect that the musical tone intended by the performer can be controlled.

  According to the electronic percussion instrument of the fourth aspect, in addition to the effect produced by the electronic percussion instrument according to any one of the first to third aspects, the vibration level detecting means detects the vibration level of the percussion surface and performs the first time measurement. The means detects that the hitting surface has been struck when the vibration level detected by the vibration level detection means is greater than the first threshold, and the first timing means detects the vibration detected by the vibration level detection means. Time is measured when the level is greater than a second threshold, which is a value greater than the first threshold. Therefore, when the hit is small, a tone is generated and the stop of the tone is not suppressed. However, when the hit is large, the tone is generated and the stop of the tone is suppressed. When the vibration level is low, the impact strength is low. For example, when the upper cymbal is not moved, but when the vibration level is high, the impact strength is high and the upper cymbal may be moved to stop the musical sound. When the intensity is high, the stop of the musical sound is suppressed. Therefore, there is an effect that the musical tone intended by the performer can be controlled.

  According to the electronic percussion instrument of the fifth aspect, in addition to the effect of the electronic percussion instrument according to any one of the first to fourth aspects, the time measured by the first time measuring means until the predetermined time elapses. When it is detected that the position of the striking surface detected by the position detecting means is the first position, the time measuring means is provided with second time measuring means for starting time measurement, and the control means is timed by the second time measuring means. If the position detected by the position detection means is not the first position when the predetermined time has elapsed, control is performed so that the musical sound stop instruction means does not give a musical sound stop instruction, and the position detection means detects the musical sound. If the detected position is the first position, control is performed so that a musical sound stop instruction is issued by the musical sound stop instruction means. Therefore, when the performer hits the hitting surface, the music sound is prevented from being stopped by the descent of the hitting surface, and the player intentionally moves the hitting surface to the first position. Has the effect that the musical sound can be stopped immediately.

  According to the electronic percussion instrument of the sixth aspect, in addition to the effect produced by the electronic percussion instrument according to any one of the first to fourth aspects, the filter means changes the fluctuation of the position detected by the position detection means to a slow fluctuation. The control means instructs the musical sound generation instructing means when the position changed by the filter means is the first position until the time measured by the first time measuring means passes a predetermined time. Since the sound source is instructed to stop the musical sound generated in response to the hitting surface, even if the hitting surface is lowered by hitting the hitting surface, the moving distance due to the lowering is changed to be small, It is possible to prevent the started pronunciation from being stopped.

  On the other hand, after the predetermined time has elapsed, it is determined whether or not the position is the first position based on the position of the hitting surface detected by the position detecting means instead of the position changed by the changing means. When the upper cymbals are lowered by the player operating the foot pedal, the sounding started by the upper cymbals is stopped and the musical tone intended by the performer can be controlled.

  Hereinafter, a preferred first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing an electrical configuration of an electronic percussion instrument 1 of the present invention. The electronic percussion instrument 1 controls the musical tone as intended by the performer. As shown in FIG. 1, the electronic percussion instrument 1 mainly includes a CPU 2, a ROM 3, a RAM 4, an operation panel 5, an input unit 6, a sound source 7, and a D / A converter 8.

  The CPU 2 is a central processing unit that controls the entire electronic percussion instrument 1, and has a built-in timer 2a that measures time. The ROM 3 stores various control programs 3a executed by the CPU 2 and fixed value data referred to during the execution. Note that a program for executing the processing of the flowcharts shown in FIGS. 2 and 3 described later is a part of the control program 3 a stored in the ROM 3.

  The RAM 4 has a working area in which various register groups used for executing the control program 3a executed by the CPU 2 are set, a temporary area that temporarily stores data being processed, and the like, and is randomly accessed. It is a rewritable memory. In this temporary area, a flag memory 4a and an upper cymbal position memory 4b are provided. A hit flag is stored in the flag memory 4a. The hit flag is set when the upper cymbal 100 is hit, and is reset after a predetermined time is counted by the timer 2a. During the predetermined time, even if the upper cymbal position is moved from the open position to the closed position, the musical sound generated in response to the upper cymbal being hit is controlled so as not to stop.

  The upper cymbal position memory 4b stores the position of the upper cymbal 100 detected by the displacement sensor 60 (hereinafter referred to as “upper cymbal position”). The upper cymbal position is detected every predetermined time, and the position information detected last time is stored in the upper cymbal position memory 4b, and the upper cymbal position is closed from the open position by comparing with the currently detected position. It is determined whether or not it has moved to a position.

  The sound source 7 generates a musical sound or stops the generated musical sound in accordance with an instruction from the CPU 2. The sound source 7 is provided with a waveform ROM (not shown). In this waveform ROM, a hi-hat sound (open sound, half sound, close sound) corresponding to the upper cymbal position indicated by the displacement sensor value detected by the displacement sensor 60 is provided. Sound data) is stored. When the vibration level detected by the vibration sensor 70 exceeds the threshold value, it is determined that the hitting surface has been hit, and a digital tone having a tone color corresponding to the displacement sensor value output from the displacement sensor 60 at that time is used as the waveform ROM. Is read out, and a predetermined process such as filter or effect is performed and output.

  The sound source 7 is provided with a DSP (Digital Signal Processor) that performs processing such as filters and effects, and a TVF (Time Valiant Filter) is formed by the DSP. This TVF is a low-pass filter that can change the cutoff frequency. For example, when an open sound is generated by the sound source 7, the cutoff frequency is set high, and when a close sound is generated, the cutoff frequency is set low. Is done.

  The digital musical tone signal output from the sound source 7 is output to the D / A converter 8. The D / A converter 8 converts the input digital musical tone signal into an analog musical tone signal and outputs it to the amplifier 21. The amplifier 21 amplifies the input analog musical sound signal and drives the speaker 22.

  The operation panel 5 is provided with an operation element for setting a parameter such as a volume, and a display for displaying the value of the parameter set by the operation element. The threshold value for the sensor and the like are also arbitrarily set by this operation panel.

  The input unit 6 includes input terminals for inputting analog signals from the displacement sensor 60 and the vibration sensor 70 provided in the electronic hi-hat shown in FIG. 6, and a displacement sensor value (position information) detected by the displacement sensor 60. The vibration level detected by the vibration sensor 70 is input. These analog values are respectively input to an A / D converter (not shown). In the A / D converter, each analog value is converted into a digital value at a predetermined time and output to the CPU 2.

  Next, with reference to FIG. 2 and FIG. 3, the process for controlling a musical tone appropriately in the electronic percussion instrument 1 configured as described above will be described. FIG. 2 is a flowchart showing a main process executed by the electronic percussion instrument 1. This main process starts when the power is turned on, and is repeatedly executed by the CPU 2 while the power is turned on.

  In this main process, first, the batting flag stored in the flag memory 4a is reset (S1). Next, the vibration level detected by the vibration sensor 70 is input, and it is determined whether or not the upper cymbal 100 has been hit (S2). This determination is made when the vibration level is higher than the first threshold value, and it is determined that the player has not been hit when the vibration level is lower than the first threshold value.

  If it is determined that a hit has been made (S2: Yes), it is determined whether or not the current upper cymbal position detected by the displacement sensor 60 is an open position (S3). In this embodiment, in order to simplify the explanation, when the upper cymbal position is above a predetermined position (open position in FIG. 7), the sound source 7 is an open sound (open, half, and slite sound). Is output below the predetermined position (closed position in FIG. 7), a close sound (closed, pressed) is output.

  If it is determined that the upper cymbal position is the open position (S3: Yes), the sound source 7 is instructed to generate an open sound (S4). It is determined whether or not the vibration level detected by the vibration sensor 70 is greater than the second threshold (S5). The second threshold is set to a value larger than the first threshold. If it is determined that the vibration level detected by the vibration sensor 70 is greater than the second threshold (S5: Yes), the batting flag stored in the flag memory 4a is set (S6), and the time count by the timer 2a is set. Start (S7).

  On the other hand, in the determination process of S3, when it is determined that the upper cymbal position is below the predetermined position and is not an area for outputting an open sound (S3: No), a close sound is generated in the sound source 7. (S8). In the determination process of S2, if it is determined that no hit is made (S2: No), the process of S7 is completed, the process of S8 is completed, or the determination process of S5, the vibration sensor When it is not determined that the vibration level detected by 70 is larger than the second threshold (S5: No), the displacement sensor process is performed next (S9), and after the displacement sensor process is completed, the process returns to S2. This displacement sensor process will be described with reference to FIG.

  FIG. 3 is a flowchart showing the displacement sensor process. In the displacement sensor process, first, the displacement sensor value input from the displacement sensor 60 to the input unit 6 and A / D converted is read (S11), and then it is determined whether or not the vibration flag is set (S12). ). When the vibration flag is set (S12: Yes), it is determined whether or not the timer 2a has timed a predetermined time T0 (for example, 100 msec) (S13), and when the timer 2a has timed the predetermined time T0 (S13: Yes), the vibration flag stored in the flag memory 4a is reset (S14). The predetermined time T0 is set to the maximum time during which the upper cymbal 100 is located at the closed position when the player strikes the upper cymbal 100, and this time is determined by the material and structure of the upper cymbal 100. .

  When the vibration flag is not set (S12: No), or when the process of S14 is finished, it is determined whether or not the upper cymbal 100 has moved from the open position to the closed position (S15). The previously detected upper cymbal position is stored in the upper cymbal position memory 4b, and it is determined whether or not the position of the upper cymbal 100 has moved from the open position to the closed position based on the position detected this time. After the determination is completed, the upper cymbal position detected this time is stored in the upper cymbal position memory 4b.

  If the upper cymbal position has moved from the open position to the closed position (S15: Yes), the sound source 7 is instructed to stop the open sound (S16). In the determination process of S13, when the time counted by the timer 2a has not reached the predetermined time T0 (S13: No), or in the determination process of S15, the upper cymbal position has moved from the open position to the close position. If not (S15: No), or if the process of S16 is terminated, the displacement sensor process is terminated and the process returns to the main process.

  As described above with respect to the first embodiment, when the upper cymbal 100 is hit, the timer 2a starts timing from when the upper cymbal 100 is hit, and until the timing reaches a predetermined time. Since the upper cymbal position is not detected, the musical sound generated by hitting the upper cymbal 100 is controlled so as not to stop even when the upper cymbal 100 is moved to the closed position. Therefore, even if the performer strikes the upper cymbal 100 and thereby the upper cymbal 100 is lowered and reaches the closed position, the musical sound that is not intended by the performer is not stopped. In the embodiment, particularly when the upper cymbal 100 is hit strongly and the vibration level of the upper cymbal 100 is greater than the second threshold, the timer 2a measures the time and suppresses the stop of the musical sound for a predetermined time. On the other hand, when the time measured by the timer 2a exceeds the predetermined time T0, the upper cymbal position is detected, and when it is the closed position, the open sound is stopped.

  Next, a second embodiment will be described with reference to FIG. The second embodiment is different only in the displacement sensor processing shown in FIG. 3, and the other parts are the same as those in the first embodiment. In the second embodiment, a position flag is stored in the flag memory 4a of the RAM 4 in addition to the vibration flag. This position flag is set when the upper cymbal position is moved from the open position to the closed position between the time when the upper cymbal 100 is hit and the predetermined time T1 has elapsed, and the predetermined time T2 has elapsed since then. If reset.

  In the second embodiment, when the upper cymbal 100 is hit, the timer 2a starts timing, and when the upper cymbal position moves from the open position to the closed position until the predetermined time T1 elapses, the timer The time measurement by 2a is resumed, and when the upper cymbal position is still the closed position after the predetermined time T2, control is performed to stop the generated musical sound. In this way, if the performer moves the upper cymbal 100 to the closed position by operating the foot pedal 440 of the electronic hi-hat 80 during the predetermined time T1, the musical sound can be stopped immediately.

  FIG. 4 is a flowchart showing displacement sensor processing in the second embodiment. In this displacement sensor processing, first, the displacement sensor value input from the displacement sensor 60 to the input unit 6 and subjected to A / D conversion is read (S21), and then it is determined whether or not the position flag is set (S22). ). The position flag is reset when the electronic percussion instrument 1 is turned on, like the vibration flag.

  If the position flag is not set (S22: No), it is determined whether or not the timer 2a has timed a predetermined time T1 (for example, 100 msec) (S23), and the timer 2a has timed the predetermined time T1. (S23: Yes), the vibration flag is reset (S24).

  When the process of S24 is completed, or when the timer 2a has not timed the predetermined time T1 (S23: No), it is determined whether or not the upper cymbal position has moved from the open position to the closed position (S25). When the upper cymbal position is moved from the open position to the closed position (S25: Yes), it is determined whether or not the vibration flag is set (S26), and when the vibration flag is set (S26: Yes). The position flag is set (S27), the vibration flag is reset (S28), and the timer 2a is restarted (S29). On the other hand, if the vibration flag is not set in the determination process of S26 (S26: No), the sound source 7 is instructed to stop the open sound being sounded (S30). In the determination process of S25, when the upper cymbal position has not moved from the open position to the close position (S25: No), when the process of S29 is completed, or when the process of S30 is completed, this displacement The sensor process ends.

  In the determination process of S22, when the position flag is set (S22: Yes), it is determined whether or not the timer 2a has counted the predetermined time T2 (S31). The predetermined time T2 is shorter than the predetermined time T1 determined in S13 (for example, 60 msec), and is the minimum time that the upper cymbal 100 is positioned below the closed position when the player steps on the foot pedal 440. is there.

  When the timer 2a counts the predetermined time T2 (S31: Yes), the position flag is reset (S32), and it is determined whether or not the upper cymbal position is located below the closed position (S33). When the upper cymbal position is located below the closed position (S33: Yes), it is a case where the performer depresses the foot pedal 440, so the sound source 7 is controlled so as to stop the open sound during sound generation (S30). ). When the timer 2a has not timed the predetermined time T2 (S31: No), or when the upper cymbal position is located above the closed position (S33: No), this displacement sensor process is terminated and the main process is started. Return.

  As described above, in the second embodiment, when a hit is detected in the upper cymbal 100, the timer 2a starts measuring time, and the upper cymbal 100 is not measured until the predetermined time T1 elapses. When moving from the open position to the closed position, the timing is restarted, and even if the timing has passed the predetermined time T2, if the upper cymbal position is not the closed position, the generated open sound is not stopped. Even when the predetermined time T2 has elapsed, if the upper cymbal position is the close position, the generated open sound is stopped. Therefore, even if the performer strikes the upper cymbal 100 to generate an open sound, and the impact causes the upper cymbal to descend and reach the closed position, the open sound is not stopped. Thereby, it is possible to control the musical sound intended by the performer.

  Next, a third embodiment will be described with reference to FIG. In the first embodiment, while the time measured by the timer 2a is T0, the upper cymbal position is ignored, so that even if the upper cymbal 100 is actually in the closed position, the generated open sound is Suppressing stopping. In the third embodiment, while the time measured by the timer 2a is the predetermined time T3, the fluctuation of the upper cymbal position is input to the low-pass filter, and the fluctuation is changed to a slow fluctuation, based on the changed position information. To determine the upper cymbal position. By performing this process, even when the upper cymbal 100 is hit and the upper cymbal 100 actually reaches the closed position, it is determined that the fluctuation of the upper cymbal position is alleviated and the closed position is not reached.

  FIG. 5 is a flowchart showing the displacement sensor process in the third embodiment. Steps that are the same processing as the displacement sensor processing in the first embodiment are given the same step numbers, and detailed descriptions thereof are omitted.

  In the displacement sensor process in the third embodiment, when the vibration flag is set (S12: Yes), it is determined whether or not the timer 2a has counted a predetermined time T3 (for example, 80 msec) (S13). When the timer 2a counts the predetermined time T3 (S13: Yes), the vibration flag stored in the flag memory 4a is reset (S14).

  If the time measured by the timer 2a is within the predetermined time T3 (S13: No), the low cymbal filter process is performed on the value of the upper cymbal position detected in the process of S11 (S41). This low-pass filter process is a process for changing the detected fluctuation of the upper cymbal position to a gentle fluctuation, and for example, the previously detected upper cymbal position (stored in the upper cymbal position memory 4b) and the current detection. The difference from the upper cymbal position is multiplied by a predetermined coefficient (a value smaller than 1), the product is added to the previously detected upper cymbal position, and the added value becomes the current upper cymbal position. This is the integration process. The upper cymbal position changed by this processing is stored in the upper cymbal position memory 4b.

  When the vibration flag is not set (S12: No), or when the process of S14 or S41 is finished, the upper cymbal position is opened based on the upper cymbal position stored in the upper cymbal position memory 4b. It is determined whether or not it has moved from the position to the closed position (S15).

  Therefore, if the time counted by the timer 2a has not reached the predetermined time T3, it is determined whether or not the upper cymbal 100 has moved from the open position to the closed position based on the upper cymbal position changed by the low-pass filter process. The Therefore, even if the upper cymbal 100 is hit by the player and the upper cymbal 100 is lowered by the hit, the movement of the upper cymbal 100 is changed to a smaller value, and the upper cymbal 100 moves from the open position to the closed position. It can suppress that it is judged that it was.

  On the other hand, when the time measured by the timer 2a exceeds the predetermined time T3, it is determined whether or not the upper cymbal 100 has moved from the open position to the closed position based on the upper cymbal position not subjected to the low-pass filter process. When the upper cymbal 100 is moved to the closed position by operating the foot pedal 440, the musical tone can be stopped immediately.

  When the position of the upper cymbal 100 has moved from the open position to the closed position (S15: Yes), the sound source 7 is instructed to stop the open sound (S16). Further, when the position of the upper cymbal 100 is not moved from the open position to the closed position (S15: No), the upper cymbal position is moved from the closed position based on the upper cymbal position stored in the upper cymbal position memory 4b. It is determined whether or not it has moved to the open position (S42).

  When the upper cymbal position moves from the closed position to the open position (S42: Yes), the cutoff frequency of the TVF formed in the sound source 7 is changed to the high frequency side (S43). The cutoff frequency of the TVF is set to the low frequency side when a close sound is generated.

  If the process of S16 or S43 is completed, or if it is determined in S42 that the upper cymbal position has not been moved from the closed position to the open position, the displacement sensor process is terminated. Return to the main process.

  As described above with respect to the third embodiment, when the upper cymbal 100 is hit, low-pass filter processing is performed on the detected upper cymbal position for a predetermined time to reduce fluctuations in the upper cymbal position. Even if the upper cymbal 100 is actually lowered to the closed position, it is determined that the upper cymbal position is not the closed position, and the stop of the open sound unintended by the player can be suppressed.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. Can be inferred.

  For example, in the above-described embodiment, when the vibration level detected by the vibration sensor 70 is larger than a predetermined threshold value, the time measurement is started, and until the measured time passes a predetermined time T0, T1, T3, Although the stop of the musical sound is suppressed, the predetermined time may be set according to the upper cymbal position detected by the displacement sensor 60. For example, when the position of the upper cymbal 100 is close to the closed position, the predetermined time is set short, and when the position of the upper cymbal 100 is positioned above the distant position, it is set long. By setting in this way, when the position of the upper cymbal 100 is close to the closed position, the sound generation can be stopped quickly by operating the foot pedal, and the position of the upper cymbal 100 is moved upward away from the closed position. In the case of the position, it is possible to prevent the sound generation from being stopped when the position of the upper cymbal 100 is delayed from the open position to the closed position.

  The predetermined time may be set to a time according to the vibration level. That is, the predetermined time may be set to 0 when the vibration level is small, and a predetermined time proportional to the vibration level may be set when the vibration level is equal to or greater than a predetermined value.

  In the first embodiment, when the hit of the hitting surface 110 of the upper cymbal 100 is detected, the position of the upper cymbal 100 is not detected for a predetermined time T0. In the meantime, a predetermined value may be added to the detected upper cymbal position, or the close position may be set lower by a predetermined value so that the position of the upper cymbal 100 does not reach the close position.

  In the third embodiment, the filter processing for reducing the fluctuation of the upper cymbal position is executed by the program. However, the position of the upper cymbal 100 is converted into an analog electric signal, and is configured by a resistor and a capacitor. A known analog low-pass filter may be used.

It is a block diagram which shows the structure of the electronic percussion instrument of this invention. It is a flowchart which shows the main process performed by CPU. It is a flowchart which shows a displacement sensor process. It is a flowchart which shows the displacement sensor process in 2nd Embodiment. It is a flowchart which shows the displacement sensor process in 3rd Embodiment. It is a figure which shows the structure of an electronic hi-hat which is a prior art, (a) is a whole side view of an electronic hi-hat, (b) is a cross-sectional side view which shows an upper cymbal and a lower cymbal. It is a conceptual diagram which shows the relationship between the position of an upper cymbal and the tone color of the musical tone generated with a sound source. It is a timing chart which shows the problem of the prior art.

Explanation of symbols

1 Electronic percussion instrument 2 CPU
2a Timer (an example of time measuring means)
3 ROM
4 RAM
6 Input unit 7 Sound source 60 Displacement sensor (an example of position detecting means)
70 Vibration sensor (an example of vibration detection means)
DESCRIPTION OF SYMBOLS 100 Upper cymbal 200 Lower cymbal 440 Foot pedal S2 Impact detection means S11 Position detection means S4, S8 Music sound generation instruction means S16, S30 Music sound stop instruction means S7 Timing means S41 Filter means

Claims (6)

Position detecting means for detecting the position of the striking surface whose position is arbitrarily operated;
Hitting detection means for detecting whether the hitting surface has been hit,
A musical sound generation instructing means for instructing the sound source to generate a musical sound according to the position of the striking surface detected by the position detecting means when it is detected that the striking surface has been hit by the hitting detecting means;
A musical tone stop instructing means for instructing the sound source to stop the musical sound generated in response to an instruction by the musical tone generation instructing means when the position detected by the position detecting means is the first position;
First timing means for timing the time from when it was detected that the hitting surface was hit by the hit detection means;
An electronic percussion instrument comprising: control means for suppressing a musical sound stop instruction by the musical sound stop instructing means until a time measured by the first time measuring means passes a predetermined time.   When the position detected by the position detection means is the first position after the predetermined time has elapsed after the time measured by the first time measurement means, the control means is provided by the tone stop instruction means. 2. The electronic percussion instrument according to claim 1, wherein the electronic percussion instrument is controlled to give an instruction to stop a musical sound. The musical tone generation instruction means instructs the sound source to generate a musical tone of a predetermined tone color when the position detection means detects that the position of the hitting surface is the second position,
The first time measuring means performs time measurement when the position of the hitting surface detected by the position detecting means when the hitting detection means detects that the hitting face is hit is the second position. The electronic percussion instrument according to claim 1 or 2. Comprising vibration level detection means for detecting the vibration level of the striking surface;
The hit detection means detects that the hitting surface has been hit when the vibration level detected by the vibration level detection means is greater than a first threshold, and the first timing means is determined by the vibration level detection means. The electronic percussion instrument according to any one of claims 1 to 3, wherein the time is measured when the detected vibration level is larger than a second threshold value which is a value larger than the first threshold value. Time measurement is started when the position detecting means detects that the position of the striking surface is the first position before the predetermined time has elapsed until the time measured by the first time measuring means has elapsed. A second timing means,
When the time measured by the second time measuring means has passed a predetermined time, the control means, if the position of the hitting surface detected by the position detecting means is not the first position, the music sound stop instructing means. When the position of the hitting surface detected by the position detecting means is the first position, the musical sound stop instruction is controlled by the musical sound stop instructing means. The electronic percussion instrument according to any one of claims 1 to 4. Filter means for changing the fluctuation of the position detected by the position detection means into a slow fluctuation;
The control means is configured to issue the musical sound generation instruction when the position changed by the filter means is the first position until the time measured by the first time measuring means passes the predetermined time. The sound source generated in response to the instruction by the means is instructed to stop the sound source, and after the time measured by the first time measuring means has passed the predetermined time, the position detected by the position detecting means is 5. The electronic percussion instrument according to claim 1, wherein the electronic percussion instrument is controlled so that a musical tone stop instruction is given by the musical tone stop instructing means in the first position.

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